If this is how you're going to build your web UIs going forward, take note from Apple here - add an A11Y mode. These changes exclusively harm the overall contrast of the UI and it's unfair to expect visually impaired users to deal with your visual clutter for the sake of r/unixporn eye candy.
I think you'll quickly realize that static text content has a much more appreciable "reader mode" quality that isn't a slog to look at. There's oodles of colorslop in Liquid Glass that serves no purpose but to distract the user. Don't lose readers (or god forbid, conversions) just because you're trying to toe this line.
Yeah reduced motion would probably toggle opaque backgrounds as well. But you can't really get that glass shader with css anyways so I imagine there wouldn't be many transparent effects, it's more just the layout I'm talking about for web.
I think you'll quickly realize that static text content has a much more appreciable "reader mode" quality that isn't a slog to look at. There's oodles of colorslop in Liquid Glass that serves no purpose but to distract the user. Don't lose readers (or god forbid, conversions) just because you're trying to toe this line.